A word created to describe everything and nothing. Describes actions, inactions, feelings, confirmation of plans/attitude purposes. The only way to describe a word like geen, is to infact just nod your head and say "Geen".

Pat: Geen?
Mike: Geen.
Pat: *Nod*
Lex: What the fuck are you two planning?
Mike: *Nod*

noun. A sober person (walking,standing) surrounded by high people (sitting,lying-down).

This comes from the universal famous high joke, saying a colour (usually blue, mauve or green) during a lull in the conversation.

"Geen" is a common mispronunciation of green due to the effect some drugs can have on the speech centre, and similarly, eye sight, particularly the interpretation of colour, which is often affected at the same time.
When stoned, people frequently lie back or sit low, and often marvel at the ability and effort of people who walk around. In dim lighting situations, these people will appear tinged green, and so exclaim the colour, often mispronouncing. At some point, someone must have thought it was a noun, and then aptly named the sober people moving around them.